Moulded case circuit breaker

● Produce Type Denominate And Scope

FNM5 moulded case circuit breaker is one of the new
type products developed by our company through adopting international advanced technology. It applies to the circuit with AC 50/60Hz, rated insulating voltage 800V,rated working voltage up to 690V, rated working current up to 250V. It is used to distribute electric energy in distribution network and to protect circuits and power supply units from over-load, short circuit or under-voltage. It can also be used for infrequent conversion of line and infrequent starting motors. Features:
·Small volume, high breaking capacity and short flash-over distance.
·More convenient and easier to mount function accessories
·Can be mounted with hand-operating device or motor-operating device for remote control.
·Adopting advanced technology of spouting control.

● Protection Characteristics

The thermodynamic release of the breaker has the instantaneous operation as shown on table 1 (distribution circuit breaker)and table 2(motor protection circuit breaker)

Table 1

Table 2

Note: For distribution circuit breaker 1 Oln + 20% is set for instantaneous operation;
For motor protection Circuit breaker,1 2ln±20% is set for instantaneous operation